Detect malicious URL destination?

Question

Is there an online service that can tell me if the file at a given URL is malicious?

I'm publishing URLs in my website, and would like to warn users which URLs could contain malware. I'd like to request a report with an HTTP request like:

http://www.somemalwareadvisor.com/canitrust?url=...

Thanks!

Answer 1

http://code.google.com/apis/safebrowsing/developers_guide_v2.html